Carbon based dots capped tin oxide nanosheets hybridizing with silver nanoparticles for ultra-sensitive surface enhanced raman scattering substrate
Carbon based dots capped tin oxide nanosheets (SnO₂/CDs) were synthesized by liquid exfoliation of tin oxide (SnO₂) nanoparticles in the presence of single-layer carbon based (CDs). The obtained SnO₂/CDs have lateral sizes of about 20–50 nm and heights of about 3–4 nm. A thin layer of CDs of about 1...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2021
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| Online Access: | https://hdl.handle.net/10356/152215 |
| _version_ | 1811687345950294016 |
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| author | Wang, Qian Chen, Mingming Zhang, Jiaxin Yu, Ting Fu, FengFu Dong, Yongqiang |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Wang, Qian Chen, Mingming Zhang, Jiaxin Yu, Ting Fu, FengFu Dong, Yongqiang |
| author_sort | Wang, Qian |
| collection | NTU |
| description | Carbon based dots capped tin oxide nanosheets (SnO₂/CDs) were synthesized by liquid exfoliation of tin oxide (SnO₂) nanoparticles in the presence of single-layer carbon based (CDs). The obtained SnO₂/CDs have lateral sizes of about 20–50 nm and heights of about 3–4 nm. A thin layer of CDs of about 1–2 nm in thickness are presence on the surface of the SnO₂ nanosheets. The SnO₂/CDs present excellent surface enhanced Raman spectroscopy (SERS) activity due to the chemical enhancement (CM) led by the charge transfer between SnO₂/CDs and the target molecules. The enhancement factor (EF) of the SnO₂/CDs is 1.42 × 10⁵, taking rhodamine 6G as a model target molecule. The SnO₂/CDs are further hybridized with silver nanoparticles (AgNPs) using an in situ synthesis method. The obtained homogeneous nano-hybrids (SnO₂/CDs@AgNPs) have a lot of nanogaps. The nanogaps among the AgNPs/CDs create strong electromagnetic enhancement (EM) due to the “hot spots” effect. The nanogaps among the SnO₂/CDs and AgNPs/CDs allow the target molecules to be embedded, and thus gained both the CM effect of SnO₂/CDs and the EM effect of AgNPs/CDs. As a result, the as-prepared SnO₂/CDs@AgNPs exhibits excellent SERS activities, with an ultrahigh enhancement factor of 3.27 × 10¹¹. |
| first_indexed | 2024-10-01T05:14:51Z |
| format | Journal Article |
| id | ntu-10356/152215 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:14:51Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1522152021-08-06T08:56:34Z Carbon based dots capped tin oxide nanosheets hybridizing with silver nanoparticles for ultra-sensitive surface enhanced raman scattering substrate Wang, Qian Chen, Mingming Zhang, Jiaxin Yu, Ting Fu, FengFu Dong, Yongqiang School of Physical and Mathematical Sciences Division of Physics and Applied Physics Science::Chemistry Tin Oxide Silver Nanoparticles Carbon based dots capped tin oxide nanosheets (SnO₂/CDs) were synthesized by liquid exfoliation of tin oxide (SnO₂) nanoparticles in the presence of single-layer carbon based (CDs). The obtained SnO₂/CDs have lateral sizes of about 20–50 nm and heights of about 3–4 nm. A thin layer of CDs of about 1–2 nm in thickness are presence on the surface of the SnO₂ nanosheets. The SnO₂/CDs present excellent surface enhanced Raman spectroscopy (SERS) activity due to the chemical enhancement (CM) led by the charge transfer between SnO₂/CDs and the target molecules. The enhancement factor (EF) of the SnO₂/CDs is 1.42 × 10⁵, taking rhodamine 6G as a model target molecule. The SnO₂/CDs are further hybridized with silver nanoparticles (AgNPs) using an in situ synthesis method. The obtained homogeneous nano-hybrids (SnO₂/CDs@AgNPs) have a lot of nanogaps. The nanogaps among the AgNPs/CDs create strong electromagnetic enhancement (EM) due to the “hot spots” effect. The nanogaps among the SnO₂/CDs and AgNPs/CDs allow the target molecules to be embedded, and thus gained both the CM effect of SnO₂/CDs and the EM effect of AgNPs/CDs. As a result, the as-prepared SnO₂/CDs@AgNPs exhibits excellent SERS activities, with an ultrahigh enhancement factor of 3.27 × 10¹¹. Ministry of Education (MOE) This study was financially supported by National Key Research and Development Program of China (2017YFC1600500), National Natural Science Foundation of China (21675026, 21976029), Singapore Ministry of Education (MOE Tier 2 MOE2018-T2-2-072), and the Program for Changjiang Scholars and Innovative Research Team in University (No. IRT1116). 2021-08-06T08:56:34Z 2021-08-06T08:56:34Z 2020 Journal Article Wang, Q., Chen, M., Zhang, J., Yu, T., Fu, F. & Dong, Y. (2020). Carbon based dots capped tin oxide nanosheets hybridizing with silver nanoparticles for ultra-sensitive surface enhanced raman scattering substrate. Carbon, 170, 270-276. https://dx.doi.org/10.1016/j.carbon.2020.07.074 0008-6223 https://hdl.handle.net/10356/152215 10.1016/j.carbon.2020.07.074 2-s2.0-85089890366 170 270 276 en MOE2018-T2-2-072 Carbon © 2020 Elsevier Ltd. All rights reserved. |
| spellingShingle | Science::Chemistry Tin Oxide Silver Nanoparticles Wang, Qian Chen, Mingming Zhang, Jiaxin Yu, Ting Fu, FengFu Dong, Yongqiang Carbon based dots capped tin oxide nanosheets hybridizing with silver nanoparticles for ultra-sensitive surface enhanced raman scattering substrate |
| title | Carbon based dots capped tin oxide nanosheets hybridizing with silver nanoparticles for ultra-sensitive surface enhanced raman scattering substrate |
| title_full | Carbon based dots capped tin oxide nanosheets hybridizing with silver nanoparticles for ultra-sensitive surface enhanced raman scattering substrate |
| title_fullStr | Carbon based dots capped tin oxide nanosheets hybridizing with silver nanoparticles for ultra-sensitive surface enhanced raman scattering substrate |
| title_full_unstemmed | Carbon based dots capped tin oxide nanosheets hybridizing with silver nanoparticles for ultra-sensitive surface enhanced raman scattering substrate |
| title_short | Carbon based dots capped tin oxide nanosheets hybridizing with silver nanoparticles for ultra-sensitive surface enhanced raman scattering substrate |
| title_sort | carbon based dots capped tin oxide nanosheets hybridizing with silver nanoparticles for ultra sensitive surface enhanced raman scattering substrate |
| topic | Science::Chemistry Tin Oxide Silver Nanoparticles |
| url | https://hdl.handle.net/10356/152215 |
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